129444529879 has 4 divisors (see below), whose sum is σ = 147936605584. Its totient is φ = 110952454176.

The previous prime is 129444529873. The next prime is 129444529967. The reversal of 129444529879 is 978925444921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129444529879 - 2¹⁷ = 129444398807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129444529879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129444529873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9246037842 + ... + 9246037855.

It is an arithmetic number, because the mean of its divisors is an integer number (36984151396).

Almost surely, 2^129444529879 is an apocalyptic number.

129444529879 is a deficient number, since it is larger than the sum of its proper divisors (18492075705).

129444529879 is an equidigital number, since it uses as much as digits as its factorization.

129444529879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18492075704.

The product of its digits is 52254720, while the sum is 64.

The spelling of 129444529879 in words is "one hundred twenty-nine billion, four hundred forty-four million, five hundred twenty-nine thousand, eight hundred seventy-nine".